cholestrol

[evdama]

I have a thick chalky layer of 'something' lining the top half of my soil pipe system

At the moment its not too much of a problem as they are the old 5" black resin type but I would still like to remove it somehow before it builds up any more .
i've tried the scraper attachment on some drain rods but its too tough .

Short of getting the pro's in,is there a chemical means of doing it?

 

[gday2uk]

Try some strong acid drain opener from builders merchants. Not the weak diy stuff though.

 

[swidders]

most likely limescale.